The SciFi count thus far

Following is the tally of my nephews' "must-keep" books - hardbacks and paperbacks - many battered from being read countless times:

Far and away the leader - STAR WARS - 69 books (with more to be counted)

• Warhammer/40,000 Series - 15
• David Weber - 12 - who I tracked down at BEA 2010 for an autograph for Mission of Honor, his new book
• Starfist - 12
• John Ringo - 4 
• Halo - 3
• Dan Abnett - 1

They have already provided recommendations for store inventory which I have ordered.  My in-home experts. :D